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Barton MH, Hallowell GD. Current Topics in Medical Colic. Vet Clin North Am Equine Pract 2023:S0749-0739(23)00020-2. [PMID: 37169621 DOI: 10.1016/j.cveq.2023.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023] Open
Abstract
The list of medical causes of acute or chronic colic in horses is extensive. The purpose of this article is to review 4 medical causes of equine colic with a focus on newer trends in treatment. The 4 topics selected include gastric impaction, gastric glandular disease, colon displacement, and inflammatory bowel disease.
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Affiliation(s)
- Michelle Henry Barton
- College of Veterinary Medicine, University of Georgia, 2200 College Station Road, Room 1903, Athens, GA 30602, USA.
| | - Gayle D Hallowell
- IVC Evidensia, Valley View, Main Road, Upper Broughton, Nottinghamshire, UK LE14 3BG
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2
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Dahmen K, Fischer H, Burczynski V, Albanese V, Muñoz E. Four cases of stomach perforation in adult horses. VETERINARY RECORD CASE REPORTS 2022. [DOI: 10.1002/vrc2.476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Katrin Dahmen
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
| | - Holger Fischer
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
| | - Victoria Burczynski
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
| | - Valeria Albanese
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
| | - Encarnación Muñoz
- Tierärztliches Kompetenzzentrum für Pferde Großwallstadt Altano GmbH Großwallstadt Germany
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A study comparing the healthy and diseased equine glandular gastric microbiota sampled with sheathed transendoscopic cytology brushes. J Equine Vet Sci 2022; 116:104002. [PMID: 35490972 DOI: 10.1016/j.jevs.2022.104002] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 04/18/2022] [Accepted: 04/25/2022] [Indexed: 01/14/2023]
Abstract
BACKGROUND The role of the equine gastrointestinal microbiota in the pathogenesis of equine glandular gastric disease (EGGD) is poorly understood. OBJECTIVES To investigate whether the glandular gastric microbiota is altered in horses with EGGD. STUDY DESIGN Prospective longitudinal study METHODS: Five Thoroughbred racehorses from one training centre underwent gastroscopy as part of poor performance investigation. Samples were taken from EGGD lesions and adjacent normal mucosa using sheathed transendoscopic cytology brushes and frozen at -80 °C. DNA was extracted for 16S rRNA sequencing, and sequences compared against a database to generate taxonomic classification of the microbiota. The same horses were sampled six months later. RESULTS Normal glandular mucosal samples were characterised by a higher proportion of Proteobacteria (46.3 %) than EGGD lesions (18.9 %). Relative abundance of Firmicutes was lower in samples from normal mucosa (20.0 %) than EGGD lesions (41.2 %). Linear discriminant analysis effect size (LEfSe) confirmed a greater proportion of Firmicutes species was characteristic of samples collected from EGGD lesions due to a very high relative abundance of Sarcina (up to 92.4 %) in two horses with EGGD. We were unable to comment on the stability of the glandular gastric microbiota over time. MAIN LIMITATIONS Small sample population. None of the horses examined had grossly normal gastric mucosa. CONCLUSIONS The gastric microbiota appears altered in EGGD, although we are unable to demonstrate a causative effect. Sarcina was particularly increased in abundance in EGGD and may be a useful biomarker of disease. Sheathed cytology brushes were an effective method for sampling the gastric mucosa.
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Pratt S, Bowen I, Hallowell G, Shipman E, Redpath A. Assessment of agreement using the equine glandular gastric disease grading system in 84 cases. Vet Med Sci 2022; 8:1472-1477. [PMID: 35412651 PMCID: PMC9297748 DOI: 10.1002/vms3.807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Introduction Equine glandular gastric disease (EGGD) is a common condition causing signs of gastric pain although lesions are highly variable in their appearance. The only definitive method to diagnose EGGD ante‐mortem is gastroscopy. The current recommended method for describing these lesions is the European College of Equine Internal Medicine (ECEIM) guidelines; however, repeatability between users is variable. This study aimed to validate the reliability of lesion descriptions using ECEIM consensus guidelines, using four blinded equine internal medicine diplomates. Methods Ninety‐two horses with EGGD with pre‐ and post‐treatment gastroscopy images were identified using the electronic record at a UK equine hospital between 2012 and 2019. Eight horses were excluded due to non‐diagnostic images. Four blinded observers used the recommended grading system to describe images and outcomes. Intraclass correlation coefficients and Krippendorff's alpha were used to determine reliability and agreement, respectively. Results Intraclass correlation coefficient for severity was 0.782 (95% confidence interval [CI] 0.722–0.832), for distribution was 0.671 (95% CI 0.540–0.763), for the descriptor raised was 0.635 (95% CI 0.479–0.741), fibrinosuppurative was 0.745 (95% CI 0.651–0.812), haemorrhagic was 0.648 (95% CI 0.513–0.744), hyperaemic was 0.389 (95% CI 0.232–0.522) and for outcome was 0.677 (95% CI 0.559–0.770). Krippendorff's alpha for severity was 0.466 (95% CI 0.466–0.418), for distribution was 0.304 (95% CI 0.234–0.374), for the descriptor raised was 0.268 (95% CI 0.207–0.329), fibrinosuppurative was 0.406 (95% CI 0.347–0.463), haemorrhagic was 0.287 (95% CI 0.229–0.344), hyperaemic was 0.112 (95% CI 0.034–0.188) and for outcome was 0.315 (95% CI 0.218–0.408). There was moderate reliability determined between observers using intra‐class correlation coefficients and unacceptable agreement determined between observers using Krippendorff's alpha. Discussion These results suggest that the current grading system is not comparable between observers, indicating the need to review the grading system or define more robust criteria.
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Affiliation(s)
- Stefanie Pratt
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, UK
| | - Ian Bowen
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, UK
| | - Gayle Hallowell
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, UK
| | - Emma Shipman
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, UK
| | - Adam Redpath
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, UK
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5
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Equine gastric ulcer syndrome in adult horses. Vet J 2022; 283-284:105830. [DOI: 10.1016/j.tvjl.2022.105830] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 03/01/2022] [Accepted: 04/21/2022] [Indexed: 01/10/2023]
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Lehman ML, Bass L, Gustafson DL, Rao S, O’Fallon ES. Clinical efficacy, safety and pharmacokinetics of a novel long‐acting intramuscular omeprazole in performance horses with gastric ulcers. EQUINE VET EDUC 2021. [DOI: 10.1111/eve.13546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. L. Lehman
- Department of Clinical Sciences Colorado State University College of Veterinary Medicine and Biomedical Sciences Fort Collins Colorado USA
| | - L. Bass
- Department of Clinical Sciences Colorado State University College of Veterinary Medicine and Biomedical Sciences Fort Collins Colorado USA
| | - D. L. Gustafson
- Department of Clinical Sciences Colorado State University College of Veterinary Medicine and Biomedical Sciences Fort Collins Colorado USA
| | - S. Rao
- Department of Clinical Sciences Colorado State University College of Veterinary Medicine and Biomedical Sciences Fort Collins Colorado USA
| | - E. S. O’Fallon
- Department of Clinical Sciences Colorado State University College of Veterinary Medicine and Biomedical Sciences Fort Collins Colorado USA
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Paul LJ, Ericsson AC, Andrews FM, Keowen ML, Morales Yniguez F, Garza F, Banse HE. Gastric microbiome in horses with and without equine glandular gastric disease. J Vet Intern Med 2021; 35:2458-2464. [PMID: 34351018 PMCID: PMC8478018 DOI: 10.1111/jvim.16241] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 07/23/2021] [Accepted: 07/27/2021] [Indexed: 01/04/2023] Open
Abstract
Background The role of the gastric microbiome in development or persistence of equine glandular gastric disease (EGGD) remains to be investigated. Hypothesis/Objectives The objective was to characterize the glandular mucosal and gastric fluid microbiomes of horses with and without EGGD. It was hypothesized that differences in the mucosal microbiome are associated with EGGD. Animals Twenty‐four horses were enrolled. Methods Gastroscopy was performed and EGGD scores recorded (score 0, n = 6; score 1, n = 8; score ≥2, n = 10). Gastric fluid and pinch biopsies of healthy glandular mucosa and EGGD lesions were collected via gastroscope. 16S rRNA amplicon sequencing of the gastric fluid and glandular mucosal biopsies was performed. Relationships between gastric fluid and mucosal microbial community composition were evaluated among EGGD score groups (EGGD 0‐BX, EGGD 1‐BX, EGGD ≥2‐BX) and among endoscopic appearances: controls from horses without EGGD and normal areas, hyperemic areas, and lesions from horses with EGGD. Results Microbial community structure of mucosal biopsies differed among EGGD score groups (Jaccard similarity index; P = .009). Principal coordinate analysis showed separate clusters for EGGD 0‐BX and EGGD ≥2‐BX. Conclusions and Clinical Importance A modest difference was detected in the community structure of the gastric glandular mucosal microbiome in association with EGGD score.
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Affiliation(s)
- Linda J Paul
- Louisiana State University, Veterinary Clinical Sciences, Equine Health Studies Program, Baton Rouge, Louisiana, USA
| | - Aaron C Ericsson
- Metagenomics Center, Equine Gut Group, University of Missouri, Columbia, Missouri, USA
| | - Frank M Andrews
- Louisiana State University, Veterinary Clinical Sciences, Equine Health Studies Program, Baton Rouge, Louisiana, USA
| | - Michael L Keowen
- Louisiana State University, Veterinary Clinical Sciences, Equine Health Studies Program, Baton Rouge, Louisiana, USA
| | - Francisco Morales Yniguez
- Louisiana State University, Veterinary Clinical Sciences, Equine Health Studies Program, Baton Rouge, Louisiana, USA
| | - Frank Garza
- Louisiana State University, Veterinary Clinical Sciences, Equine Health Studies Program, Baton Rouge, Louisiana, USA
| | - Heidi E Banse
- Louisiana State University, Veterinary Clinical Sciences, Equine Health Studies Program, Baton Rouge, Louisiana, USA
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Hewetson M. Managing glandular gastric disease in horses. IN PRACTICE 2021. [DOI: 10.1002/inpr.40] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Tardón A, Bataller E, Llobat L, Jiménez-Trigos E. Bacteria and antibiotic resistance detection in fractures of wild birds from wildlife rehabilitation centres in Spain. Comp Immunol Microbiol Infect Dis 2020; 74:101575. [PMID: 33260016 DOI: 10.1016/j.cimid.2020.101575] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 10/23/2020] [Accepted: 11/03/2020] [Indexed: 12/29/2022]
Abstract
Anatomic adaptations make birds more prone to open fractures with exposed bone parts losing vascularization. As a result of this exposure, fractures are colonized by different microorganisms, including different types of bacteria, both aerobic and anaerobic, causing osteomyelitis in many cases. For this reason, antibiotic treatment is common. However, carrying out antibiotic treatment without carrying out a previous antibiogram may contribute to increased resistance against antibiotics, especially in migratory wild birds. In this paper, bacterial counts regarding fracture type, bacterial identification and antibiotic resistance have been analysed in wild birds from wildlife rehabilitation centres in Spain. The results obtained showed that open fractures had higher bacterial counts (CFU/mL) than closed ones. Bacteria in family Enterobacteriaceae, identified were Escherichia spp., Enterobacter spp., Shigella spp., Hafnia alvei, Proteus mirabilis, Leclercia adecarboxylata and Pantoea agglomerans. Other bacteria present in wild birds' fractures were Aeromonas spp., Enterococcus spp. Bacillus wiedmannii and Staphylococcus sciuri. All species found presented resistance to at least one of the antibiotics used. Wild birds can be implicated in the introduction, maintenance and global spreading of antibiotic resistant bacteria and represent an emerging public health concern. Results obtained in this paper support the idea that it is necessary to take this fact into account before antibiotic administration to wild animals, since it could increase the number of bacteria resistant to antibiotics.
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Affiliation(s)
- A Tardón
- CREW Foundation (Conservation and Research for Endangered Wildlife), Lleida, Spain
| | - E Bataller
- Research Group Microbiological Agents Associated With Animal Reproduction (PROVAGINBIO), Department of Animal Production and Health, Veterinary Public Health and Food Science and Technology (PASAPTA) Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, Spain
| | - L Llobat
- Research Group Microbiological Agents Associated With Animal Reproduction (PROVAGINBIO), Department of Animal Production and Health, Veterinary Public Health and Food Science and Technology (PASAPTA) Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, Spain.
| | - E Jiménez-Trigos
- Research Group Microbiological Agents Associated With Animal Reproduction (PROVAGINBIO), Department of Animal Production and Health, Veterinary Public Health and Food Science and Technology (PASAPTA) Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, Spain.
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Cerri S, Taminiau B, de Lusancay AH, Lecoq L, Amory H, Daube G, Cesarini C. Effect of oral administration of omeprazole on the microbiota of the gastric glandular mucosa and feces of healthy horses. J Vet Intern Med 2020; 34:2727-2737. [PMID: 33063923 PMCID: PMC7694827 DOI: 10.1111/jvim.15937] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 09/28/2020] [Accepted: 10/01/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Omeprazole administration is associated with changes in gastric and fecal microbiota and increased incidence of Clostridioides difficile enterocolitis in humans and dogs. HYPOTHESIS/OBJECTIVES Study purpose was to assess the effect of omeprazole on gastric glandular and fecal microbiota in healthy adult horses. ANIMALS Eight healthy horses stabled on straw and fed 100% haylage. METHODS Prospective controlled study. Transendoscopic gastric glandular biopsies, gastric fluid, and fecal samples were obtained from each horse twice at a 7-day interval before the administration of omeprazole. Samples were taken on the same horses before and after a 7-day administration of omeprazole (4 mg/kg PO q24h). pH was assessed on fresh gastric fluid and other samples were kept at -20°C until analysis. Bacterial taxonomy profiling was obtained by V1V3 16S amplicon sequencing from feces and gastric glandular biopsies. Analysis of alpha, beta diversity, and comparison between time points were performed with MOTHUR and results were considered significant when P < .05. RESULTS Gastric pH increased significantly after 7 days of omeprazole administration (P = .006). Omeprazole did not induce significant major changes in composition of fecal or gastric glandular microbiota, however, after administration, certain microbial genera became more predominant in the gastric glandular mucosa (lower Simpson's evenness, P = .05). Only the genus Clostridium sensu strictu_1 had a significant shift in the glandular gastric mucosa after omeprazole administration (P = .002). No population shifts were observed in feces. CONCLUSIONS AND CLINICAL IMPORTANCE Oral administration of omeprazole could have fewer effects in gastrointestinal microbiota in the horse compared to other species.
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Affiliation(s)
- Simona Cerri
- FARAH Center, Comparative Veterinary Medicine Section, Clinical Department of Companion Animals and EquidsFaculty of Veterinary Medicine, University of LiegeLiègeBelgium
| | - Bernard Taminiau
- FARAH Center, Veterinary Public Health Section, Department of Food Sciences – MicrobiologyFaculty of Veterinary Medicine, University of LiegeLiègeBelgium
| | - Alexandra Hache‐Carré de Lusancay
- FARAH Center, Comparative Veterinary Medicine Section, Clinical Department of Companion Animals and EquidsFaculty of Veterinary Medicine, University of LiegeLiègeBelgium
| | - Laureline Lecoq
- FARAH Center, Comparative Veterinary Medicine Section, Clinical Department of Companion Animals and EquidsFaculty of Veterinary Medicine, University of LiegeLiègeBelgium
| | - Hélène Amory
- FARAH Center, Comparative Veterinary Medicine Section, Clinical Department of Companion Animals and EquidsFaculty of Veterinary Medicine, University of LiegeLiègeBelgium
| | - Georges Daube
- FARAH Center, Veterinary Public Health Section, Department of Food Sciences – MicrobiologyFaculty of Veterinary Medicine, University of LiegeLiègeBelgium
| | - Carla Cesarini
- FARAH Center, Comparative Veterinary Medicine Section, Clinical Department of Companion Animals and EquidsFaculty of Veterinary Medicine, University of LiegeLiègeBelgium
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Abstract
Owing to its strong acid production, the stomach was known to be a bacteria-free organ for many years. On the other hand, the presence of Helicobacter pylori (H. pylori) and other acid-resistant microbiota that are to persist in the stomach challenged this. It is now recognized that the existence of H. pylori and non-H. pylori species have been linked to the improvement of gastric disease; despite this, there is little published data on the interaction of gastric bacterial flora and the resultant effect on gastric health. The stomach has a unique microbiota including five major phyla, such as Firmicutes, Proteobacteria, Actinobacteria, Fusobacteria and Bacteroidetes. These phyla are identified in both H. pylori-infected and uninfected persons. The resident gastric microflora may mediate the role of H. pylori in the gastric diseases. This article aims to review previous studies that examine the impact of H. pylori infection and the effect of resident gastric microbiota on gut health and disease conditions. HOW TO CITE THIS ARTICLE Ozbey G, Sproston E, Hanafiah A. Helicobacter pylori Infection and Gastric Microbiota. Euroasian J Hepato-Gastroenterol 2020;10(1):36-41.
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Affiliation(s)
- Gokben Ozbey
- Department of Medical Services and Techniques, Vocational School of Health Services, Firat University, Elazig, Turkey
| | - Emma Sproston
- Department of Biology and Biochemistry, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Alfizah Hanafiah
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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Banse HE, Andrews FM. Equine glandular gastric disease: prevalence, impact and management strategies. VETERINARY MEDICINE (AUCKLAND, N.Z.) 2019; 10:69-76. [PMID: 31406687 PMCID: PMC6642651 DOI: 10.2147/vmrr.s174427] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 03/26/2019] [Indexed: 12/13/2022]
Abstract
Equine glandular gastric disease (EGGD) is an increasingly recognized disease of the glandular mucosa of the equine stomach. Diagnosis is confirmed by gastric endoscopy and scored based upon one of several different endoscopic scoring systems. Prevalence appears to be variable, depending upon breed and discipline. Primary identified risk factors include exercise frequency, and stress; therefore, management strategies are focused on reducing exercise and stress. Limiting grain intake and increasing pasture turnout may also be helpful preventative measures. Pharmacologic treatment consists primarily of an approved omeprazole product with or without misoprostol or sucralfate. Further research into the pathophysiology of EGGD may allow for identification of other targeted treatments.
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Affiliation(s)
- Heidi E Banse
- Equine Health Studies Program, Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton RougeLA, USA
| | - Frank M Andrews
- Equine Health Studies Program, Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton RougeLA, USA
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Varley G, Bowen IM, Habershon‐Butcher JL, Nicholls V, Hallowell GD. Misoprostol is superior to combined omeprazole‐sucralfate for the treatment of equine gastric glandular disease. Equine Vet J 2019; 51:575-580. [DOI: 10.1111/evj.13087] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 02/23/2019] [Indexed: 12/20/2022]
Affiliation(s)
| | - I. M. Bowen
- School of Veterinary Medicine and Science University of Nottingham Loughborough UK
| | | | - V. Nicholls
- School of Veterinary Science University of Liverpool Leahurst UK
| | - G. D. Hallowell
- School of Veterinary Medicine and Science University of Nottingham Loughborough UK
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Sykes BW, Bowen M, Habershon-Butcher JL, Green M, Hallowell GD. Management factors and clinical implications of glandular and squamous gastric disease in horses. J Vet Intern Med 2018; 33:233-240. [PMID: 30499188 PMCID: PMC6335573 DOI: 10.1111/jvim.15350] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 10/02/2018] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND To date, risk factors for equine glandular gastric disease (EGGD) have not been described in Thoroughbred racehorses. OBJECTIVES To determine management factors associated with EGGD, identify clinical signs in affected horses, and compare these to equine squamous gastric disease (ESGD). ANIMALS The study was carried out on 109 Thoroughbred racehorses from 8 training yards (3 in the United Kingdom and 5 in Australia). METHODS Gastroscopic examination alongside a questionnaire regarding management, feeding, exercise, and health. RESULTS Management factors and clinical signs were different for EGGD versus ESGD. Exercising ≥5 days per week was associated with a 10.4 times (95% CI [confidence interval]: 1.34-26.9) increased risk of EGGD. Horses racing below expectation were 3.7 times (95% CI: 1.1-16.7) more likely to have EGGD. Trainer was also identified as a risk factor for EGGD. Time in work ≤6 weeks was associated with a decreased risk of ESGD (odds ratio [OR] 0.3; 95% CI: 0.1-0.99). Horses aggressive to humans were less likely to have ESGD (OR 0.12; 95% CI: 0.03-0.54). Horses with stereotypies were more likely to have ESGD (OR 5.0; 95% CI: 1.6-15.9). CONCLUSIONS AND CLINICAL IMPORTANCE The findings of our study further support the notion that EGGD should be considered as a distinct disease entity to ESGD. Exercising ≤4 days per week could reduce the risk of EGGD. Horses with EGGD are more likely to perform below expectation and, as such, EGGD might be performance limiting in some affected individuals. Stress minimization could reduce the risk of EGGD.
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Affiliation(s)
- Benjamin W Sykes
- School of Veterinary Sciences, The University of Queensland, Gatton, Queensland, Australia.,Luoda Pharma, Caringbah, New South Wales, Australia
| | - Mark Bowen
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, United Kingdom
| | | | - Martin Green
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, United Kingdom
| | - Gayle D Hallowell
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, United Kingdom
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Calprotectin (S100A8/S100A9): a key protein between inflammation and cancer. Inflamm Res 2018; 67:801-812. [PMID: 30083975 DOI: 10.1007/s00011-018-1173-4] [Citation(s) in RCA: 150] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 07/19/2018] [Accepted: 07/25/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Calprotectin (S100A8/S100A9), a heterodimeric EF-hand Ca2+ binding protein, are abundant in cytosol of neutrophils and are involved in inflammatory processes and several cancerous pathogens. OBJECTIVE The purpose of the present systematic review is to evaluate the pro- and anti-tumorigenic functions of calprotectin and its relation to inflammation. MATERIALS AND METHODS We conducted a review of studies published in the Medline (1966-2018), Scopus (2004-2018), ClinicalTrials.gov (2008-2018) and Google Scholar (2004-2018) databases, combined with studies found in the reference lists of the included studies. RESULTS Elevated levels of S100A8/S100A9 were detected in inflammation, neoplastic tumor cells and various human cancers. Recent data have explained that many cancers arise from sites of infection, chronic irritation, and inflammation. The inflammatory microenvironment which largely includes calprotectin, has an essential role on high producing of inflammatory factors and then on neoplastic process and metastasis. CONCLUSION Scientists have shown different outcomes in inflammation, malignancy and apoptosis whether the source of the aforementioned protein is extracellular or intracellular. These findings are offering new insights that anti-inflammatory therapeutic agents and anti-tumorigenic functions of calprotectin can lead to control cancer development.
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Bass L, Swain E, Santos H, Hess T, Black J. Effects of Feeding Frequency Using a Commercial Automated Feeding Device on Gastric Ulceration in Exercised Quarter Horses. J Equine Vet Sci 2018; 64:96-100. [DOI: 10.1016/j.jevs.2018.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 01/24/2018] [Accepted: 02/03/2018] [Indexed: 10/18/2022]
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Rendle D, Bowen M, Brazil T, Conwell R, Hallowell G, Hepburn R, Hewetson M, Sykes B. Recommendations for the management of equine glandular gastric disease. ACTA ACUST UNITED AC 2018. [DOI: 10.12968/ukve.2018.2.s1.3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Pennington MR, Cossic BGA, Perkins GA, Duffy C, Duhamel GE, Van de Walle GR. First demonstration of equid gammaherpesviruses within the gastric mucosal epithelium of horses. Virus Res 2017; 242:30-36. [PMID: 28870469 DOI: 10.1016/j.virusres.2017.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 08/31/2017] [Accepted: 09/01/2017] [Indexed: 12/25/2022]
Abstract
Horses commonly develop gastric mucosal ulcers, similar to humans, a condition known as equine gastric ulcer syndrome (EGUS) that can lead to poor performance and lost training time and care expenses. Unlike humans, however, an infectious bacterial cause of ulcers has not been conclusively identified. Herpesviruses, while well-established causative agents of diseases such as cold sores, genital lesions, and certain types of cancer, have also been implicated in the development of a subset of gastric ulcers in humans. The presence of equid herpesviruses in the gastrointestinal tract and their potential contribution to EGUS has not been evaluated. Here, we provide the first evidence of equid gammaherpesviruses 2 and 5 (EHV-2 and -5) within the epithelium of the gastric mucosa of horses. These viruses were initially detected by a nested PCR screen of gastric tissue samples obtained from client- and university-owned horses with and without ulcers; however, no association with EGUS was found in this limited sample set. We then validated a highly sensitive in situ hybridization (ISH) assay and used this assay to characterize the distribution of these viruses in necropsy gastric tissue samples from five racehorses. Analyses revealed frequent EHV-2 and EHV-5 co-infections within the gastric mucosal epithelium, regardless of the ulcer status. These results are the first to demonstrate the presence of equid gammaherpesviruses in the gastric mucosa of horses and warrants further investigation to determine the contribution of these viruses to the development of EGUS and/or other gastrointestinal diseases.
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Affiliation(s)
- Matthew R Pennington
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Brieuc G A Cossic
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Gillian A Perkins
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Carol Duffy
- Department of Biological Sciences, College of Arts and Sciences, University of Alabama, Tuscaloosa, AL, USA
| | - Gerald E Duhamel
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Gerlinde R Van de Walle
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA.
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Diseases of the Alimentary Tract. Vet Med (Auckl) 2017. [PMCID: PMC7167529 DOI: 10.1016/b978-0-7020-5246-0.00007-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Sykes BW, Hewetson M, Hepburn RJ, Luthersson N, Tamzali Y. European College of Equine Internal Medicine Consensus Statement--Equine Gastric Ulcer Syndrome in Adult Horses. J Vet Intern Med 2016; 29:1288-99. [PMID: 26340142 PMCID: PMC4858038 DOI: 10.1111/jvim.13578] [Citation(s) in RCA: 168] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/19/2015] [Accepted: 06/10/2015] [Indexed: 12/01/2022] Open
Affiliation(s)
- B W Sykes
- BW Sykes Consultancy, Upper Orara, NSW, Australia.,School of Veterinary Sciences, The University of Queensland, Gatton, QLD, Australia
| | - M Hewetson
- Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - R J Hepburn
- B&W Equine Hospital, Breadstone, Berkeley, Gloucestershire, UK
| | | | - Y Tamzali
- Equine Internal Medicine, Université de Toulouse, Toulouse, France
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Hund A, Dzieciol M, Schmitz-Esser S, Wittek T. Characterization of mucosa-associated bacterial communities in abomasal ulcers by pyrosequencing. Vet Microbiol 2015; 177:132-41. [PMID: 25770891 DOI: 10.1016/j.vetmic.2015.02.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 02/19/2015] [Accepted: 02/23/2015] [Indexed: 12/21/2022]
Abstract
Abomasal ulcers are important pathological alterations of the gastrointestinal tract in cattle and are exceptionally hard to diagnose in vivo. The microbiome of the abomasum in cattle with or without ulcers has hardly been studied to date, and if so, the studies used culture-dependent methods. In the present study, the bacterial communities associated with abomasal ulcers of slaughter cows, bulls, and calves in Austria were described using 16S rRNA gene pyrosequencing. Sequences were clustered into 10,459 operational taxonomic units (OTUs), affiliating to 28 phyla with Proteobacteria, Firmicutes, Bacteroidetes and Tenericutes dominating (96.4% of all reads). The most abundant genera belonged to Helicobacter, Acetobacter, Lactobacillus, and novel Mycoplasma-like phylotypes. Significant differences between the microbial communities of healthy and ulcerated calves compared to cows and bulls could be observed. However, only few statistically significant differences in the abundances of certain OTUs between healthy and ulcerated abomasal mucosa were found. Additionally, near full-length 16S rRNA gene sequences of the most abundant phylotypes were obtained by cloning and Sanger sequencing (n=88). In conclusion, our results allow the first deep insights into the composition of abomasal mucosal bacterial communities in cattle and describe a hitherto unknown high diversity and species richness of abomasal bacteria in cattle. Our results suggest that bacteria may have only limited involvement in the etiology of abomasal ulcers. However, future research will be needed to verify the contribution of bacteria to abomasal ulcer formation as presence or absence of bacteria does not necessarily correlate with etiology of disease.
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Affiliation(s)
- Alexandra Hund
- University Clinic for Ruminants, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Monika Dzieciol
- Institute for Milk Hygiene, Milk Technology and Food Science, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Stephan Schmitz-Esser
- Institute for Milk Hygiene, Milk Technology and Food Science, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, 1210 Vienna, Austria; Research Cluster Animal Gut Health, University of Veterinary Medicine Vienna, 1210 Vienna, Austria.
| | - Thomas Wittek
- University Clinic for Ruminants, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
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Sykes B, Jokisalo JM. Rethinking equine gastric ulcer syndrome: Part 3 - Equine glandular gastric ulcer syndrome (EGGUS). EQUINE VET EDUC 2015. [DOI: 10.1111/eve.12287] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- B. Sykes
- BW Sykes Consultancy; Upper Orara New South Wales Australia
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Sykes BW, Sykes KM, Hallowell GD. Administration of trimethoprim-sulphadimidine does not improve healing of glandular gastric ulceration in horses receiving omeprazole: a randomised, blinded, clinical study. BMC Vet Res 2014; 10:180. [PMID: 25927827 PMCID: PMC4445647 DOI: 10.1186/s12917-014-0180-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 08/06/2014] [Indexed: 11/10/2022] Open
Abstract
Background Interest in Equine Gastric Ulcer Syndrome (EGUS) has recently increased in part due to a growing awareness of the differences between squamous and glandular disease. The pathophysiology and epidemiology of squamous and glandular disease are different and recently it has been shown that the response of glandular gastric ulceration to monotherapy with omeprazole is poor. Given these differences it has been recommended that specific treatment guidelines be formulated for equine glandular disease and that adjunctive therapies be investigated. Along these lines it has been suggested that the addition of antimicrobials may enhance healing. The objective of this study was to investigate whether the addition of trimethoprim-sulphadimidine to omeprazole therapy would result in superior healing of naturally occurring equine glandular ulceration compared with omeprazole monotherapy. Results Combination therapy of omeprazole plus trimethoprim-sulphadimidine could not be demonstrated to be superior to omeprazole monotherapy. Healing of the glandular mucosa was observed in 7/15 (47%; 95% CI 24 to 71%) and 3/13 (23%; 95% CI 7% to 50%) of horses in the TMPS and OMEP groups, respectively (OR?=?1.8; 95% CI 0.32 to 10.0; p?=?0.67). Improvement of the glandular mucosa was observed in 12/15 (80%; 95% CI 56 to 94%) and 9/13 (69%; 95% CI 42 to 89%) of horses in the TMPS and OMEP groups, respectively (OR?=?2.9; 95% CI 0.6 to 15.0; p?=?0.25). Conclusions The results of the present study do not support the addition of trimethoprim-sulphadimidine to therapeutic protocols for equine glandular ulceration. Several limitations were present in the study and the use of antimicrobials as an adjunctive treatment warrants further investigation. However, given the potential deleterious consequences associated with the indiscriminate use of antimicrobials, the inclusion of antimicrobials in treatment regimes for EGUS is not justified until their efficacy is further validated.
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Affiliation(s)
- Ben W Sykes
- BW Sykes Consultancy, Upper Orara, NSW, Australia.
| | | | - Gayle D Hallowell
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, UK.
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Sykes BW, Sykes KM, Hallowell GD. A comparison of three doses of omeprazole in the treatment of equine gastric ulcer syndrome: A blinded, randomised, dose-response clinical trial. Equine Vet J 2014; 47:285-90. [PMID: 24761780 DOI: 10.1111/evj.12287] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Accepted: 04/06/2014] [Indexed: 12/13/2022]
Abstract
REASONS FOR PERFORMING THE STUDY A previous study demonstrated that a dose effect between 1.6 and 4.0 mg/kg bwt of omeprazole per os s.i.d. is present in the treatment of equine gastric ulceration. In the same study, healing of glandular ulceration appeared inferior to healing of squamous ulceration. However, several limitations were recognised in that study and further investigation is warranted. OBJECTIVES To further investigate the presence of a dose relationship in the treatment of gastric ulceration under conditions that may favour omeprazole efficacy such as administration prior to exercise and after a brief fast, and potential differences between the response of squamous and glandular ulceration to omeprazole therapy. STUDY DESIGN A blinded, randomised, dose-response clinical trial. METHODS Sixty Thoroughbred racehorses with grade ≥2/4 squamous and/or glandular ulceration were identified by gastroscopy. Horses were randomly assigned to receive either 1.0, 2.0 or 4.0 mg/kg bwt of enteric coated omeprazole per os s.i.d. 1-4 h prior to exercise. Gastroscopy was repeated at approximately 28 days. RESULTS The lower doses studied (1.0 and 2.0 mg/kg bwt) were noninferior to the reference dose (4.0 mg/kg bwt) in the treatment of squamous ulceration. Healing was greater in squamous ulceration than glandular ulceration (86% vs. 14%; P<0.0001). Improvement in ulcer grade was more likely in squamous lesions than glandular lesions (96% vs. 34%; P<0.0001). Worsening of the glandular ulcer grade was observed in 36% of horses. CONCLUSIONS The results of this study suggest that, under the conditions studied, where omeprazole is administered before exercise and following a brief fast, doses of omeprazole as low as 1 mg/kg bwt per os s.i.d. may be as effective as higher doses. The proportion of glandular ulceration that heals with 28 days of omeprazole therapy is less than that of squamous ulceration.
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Affiliation(s)
- B W Sykes
- BW Sykes Consultancy, Upper Orara, New South Wales, Australia
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Sykes BW, Sykes KM, Hallowell GD. A comparison between pre- and post exercise administration of omeprazole in the treatment of equine gastric ulcer syndrome: A blinded, randomised, clinical trial. Equine Vet J 2013. [DOI: 10.1111/evj.12083] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- B. W. Sykes
- BW Sykes Consultancy; Upper Orara New South Wales Australia
| | - K. M. Sykes
- BW Sykes Consultancy; Upper Orara New South Wales Australia
| | - G. D. Hallowell
- School of Veterinary Medicine and Science; University of Nottingham; Sutton Bonington UK
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Yang I, Nell S, Suerbaum S. Survival in hostile territory: the microbiota of the stomach. FEMS Microbiol Rev 2013; 37:736-61. [DOI: 10.1111/1574-6976.12027] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 05/28/2013] [Accepted: 06/07/2013] [Indexed: 02/06/2023] Open
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Malmkvist J, Poulsen JM, Luthersson N, Palme R, Christensen JW, Søndergaard E. Behaviour and stress responses in horses with gastric ulceration. Appl Anim Behav Sci 2012. [DOI: 10.1016/j.applanim.2012.10.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
Little is known about the gastric mucosal microbiota in healthy horses, and its role in gastric disease has not been critically examined. The present study used a combination of 16S rRNA bacterial tag-encoded pyrosequencing (bTEFAP) and fluorescence in situ hybridization (FISH) to characterize the composition and spatial distribution of selected gastric mucosal microbiota of healthy horses. Biopsy specimens of the squamous, glandular, antral, and any ulcerated mucosa were obtained from 6 healthy horses by gastroscopy and from 3 horses immediately postmortem. Pyrosequencing was performed on biopsy specimens from 6 of the horses and yielded 53,920 reads in total, with 631 to 4,345 reads in each region per horse. The microbiome segregated into two distinct clusters comprised of horses that were stabled, fed hay, and sampled at postmortem (cluster 1) and horses that were pastured on grass, fed hay, and biopsied gastroscopically after a 12-h fast (cluster 2). The types of bacteria obtained from different anatomic regions clustered by horse rather than region. The dominant bacteria in cluster 1 were Firmicutes (>83% reads/sample), mainly Streptococcus spp., Lactobacillus spp. and, Sarcina spp. Cluster 2 was more diverse, with predominantly Proteobacteria, Bacteroidetes, and Firmicutes, consisting of Actinobacillus spp. Moraxella spp., Prevotella spp., and Porphyromonas spp. Helicobacter sp. sequences were not identified in any of 53,920 reads. FISH (n = 9) revealed bacteria throughout the stomach in close apposition to the mucosa, with significantly more Streptococcus spp. present in the glandular region of the stomach. The equine stomach harbors an abundant and diverse mucosal microbiota that varies by individual.
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Weiss ATA, Lübke-Becker A, Krenz M, van der Grinten E. Enteritis and Septicemia in a Horse Associated With Infection by Escherichia fergusonii. J Equine Vet Sci 2011. [DOI: 10.1016/j.jevs.2011.01.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Vahjen W, Pieper R, Zentek J. Increased dietary zinc oxide changes the bacterial core and enterobacterial composition in the ileum of piglets. J Anim Sci 2011; 89:2430-9. [PMID: 21383037 DOI: 10.2527/jas.2010-3270] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
This study was conducted to investigate the effects of increased dietary ZnO on the bacterial core and enterobacterial composition in the small intestine of piglets that were fed diets containing a total of 124 or 3,042 mg of Zn per kilogram of diet, respectively. Zinc was supplemented to the basal diet as ZnO. Bacterial 16S rRNA genes of ileal DNA extracts were PCR-amplified with 2 bar-coded primer sets and sequenced by 454 pyrosequencing. The bacterial core species were calculated from the relative abundances of reads present in 5 of 6 samples per group and at a minimum of 5 sequences per sample. The reference database SILVA was used to assign sequence reads at an alignment minimum of 200 bases and 100% identity. Lactic acid bacteria dominated the bacterial core, but showed diverse responses to dietary ZnO. Of the dominant Lactobacillus spp., Lactobacillus reuteri was reduced due to increased dietary ZnO (44.7 vs. 17.9%; P=0.042), but L. amylovorus was not influenced. However, the changes of relative abundances of other lactic acid bacteria were more noteworthy; Weissella cibaria (10.7 vs. 23.0%; P=0.006), W. confusa (10.0 vs. 22.4%; P=0.037), Leuconostoc citreum (6.5 vs. 14.8%; P=0.009), Streptococcus equinus (0.14 vs. 1.0%; P=0.044), and S. lutetiensis (0.01 vs. 0.11%; P=0.016) increased in relative abundance. Nonlactic acid bacteria that were influenced by increased dietary ZnO included the strict anaerobic species, Sarcina ventriculi, which showed a strong numerical decrease in relative abundance (14.6 vs. 5.1%). Species of the Enterobacteriaceae increased their relative abundance, as well as species diversity, in the high dietary ZnO experimental group. Bacterial diversity indices were increased due to increased dietary ZnO (P < 0.05), which was traced back to the increase of sequences from subdominant species. Increased dietary ZnO led to an increase of less prominent species and, thus, had a major impact on the bacterial composition and diversity in piglets. This effect may help to stabilize the intestinal microbiota in the sensitive postweaning period.
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Affiliation(s)
- W Vahjen
- Institute of Animal Nutrition, Department of Veterinary Medicine, Freie Universität Berlin, 14195 Berlin, Germany.
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Goldman CG, Mitchell HM, Havaspour A, Nooranipour M, Habibinejad AA. Helicobacter spp. other than Helicobacter pylori. Helicobacter 2010; 15 Suppl 1:69-75. [PMID: 21054656 DOI: 10.1111/j.1523-5378.2010.00780.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Over the last 12 months, new insights into the association of non-Helicobacter pylori Helicobacters with a range of human diseases in children and adults, including hepatobiliary disease, Crohn's disease, sepsis, and gastric disease were published. Studies investigating the presence of non-H. pylori Helicobacters in domestic animals reinforce previous findings that cats and dogs harbor gastric Helicobacter species and thus may be an important source of these organisms in humans. The confounding effect of enterohepatic Helicobacters on the outcome of biomedical research was investigated in several studies and led to recommendations that animals should be screened prior to performing experiments. A number of important and novel investigations regarding pathogenic mechanisms and immune responses to enterohepatic Helicobacters were conducted. Genomic advances in non-H. pylori Helicobacters included description of the complete genome of Helicobacter canadensis, delineation of two Helicobacter bilis genomospecies, and identification of a novel cis-regulatory RNA. New insights concerning growth conditions, biochemical characterization, and the effect of certain dietary compounds on Helicobacter spp. have also been reported.
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Affiliation(s)
- Cinthia G Goldman
- School of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina.
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